Normal Values

C-Peptide

Alternate Names

Insulin C-Peptide

Connecting Peptide Insulin

Proinsulin C-Peptide

The pancreas releases insulin and C-peptide; both can be measured to diagnose how well your pancreas is functioning. Although insulin levels are usually measured, C-peptide levels may also be tested, in order to provide a more accurate picture of pancreas function following transplant, or to diagnose the presence of pancreatic cancer. Low blood levels of C-peptide and insulin are seen in people with Type I Diabetes Mellitus (DM); normal levels of C-peptide and insulin are seen in people with Type II DM; and C-peptide levels may also be an indication of whether you need to continue receiving insulin injections as a treatment for DM.

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